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HEREDITAS ›› 2009, Vol. 31 ›› Issue (4): 337-338.doi: 10.3724/SP.J.1005.2009.00337

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  1. The No.1 Middle School, Mianyang, Sichuan 621000, China
  • Received:2005-08-08 Revised:2007-06-21 Online:2009-04-10 Published:2009-04-10